function CheckRadioButton(){
var temp=document.getElementsByName("radiobutton");
var Checked=false;
for (i=0;i<temp.length;i++){
if(temp[i].checked)
{
Checked=true;
break;
}
else
{
Checked=false;
}
}
if(Checked==false)
{
alert('Please select your favourite team.');
return false;
}
}
